LPC2468FET208,551 NXP Semiconductors, LPC2468FET208,551 Datasheet - Page 529

• Manufacturer Part Number: LPC2468FET208,551
• Description: IC ARM7 MCU FLASH 512K 208TFBGA
• Manufacturer: NXP Semiconductors
• Series: LPC2400r

Specifications of LPC2468FET208,551

• Program Memory Type: FLASH
• Program Memory Size: 512KB (512K x 8)
• Package / Case: 208-TFBGA
• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 72MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, Microwire, MMC, SPI, SSI, SSP, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
• Number Of I /o: 160
• Ram Size: 98K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: LPC24
• Core: ARM7TDMI-S
• Data Bus Width: 16 bit, 32 bit
• Data Ram Size: 98 KB
• Interface Type: CAN/I2S/ISP/SSP/UART/USB
• Maximum Clock Frequency: 72 MHz
• Number Of Programmable I/os: 160
• Number Of Timers: 6
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2, IRD-LPC2468-DEV, SAB-TFBGA208, KSK-LPC2468-PL
• Development Tools By Supplier: OM10100
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• On-chip Dac: 1-ch x 10-bit
• Package: 208TFBGA
• Device Core: ARM7TDMI-S
• Family Name: LPC2000
• Maximum Speed: 72 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 622-1025 - KIT DEV IND REF DESIGN LPC2468622-1024 - BOARD SCKT ADAPTER FOR TFBGA208568-4358 - DISPLAY QVGA TFT FOR OM10100568-4309 - BOARD EXTENSION LPCSTICK568-4308 - EVAL LPC-STICK WITH LPC2468MCB2400U - BOARD EVAL MCB2400 + ULINK2MCB2400 - BOARD EVAL FOR NXP LPC246X SER622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-4262; 935283234551; LPC2468FET208-S

NXP Semiconductors
UM10237_4
User manual
5.3 Slave operation
5.4 Exception conditions
Note: A read or write of the SPI data register is required in order to clear the SPIF status
bit. Therefore, if the optional read of the SPI data register does not take place, a write to
this register is required in order to clear the SPIF status bit.
The following sequence describes how one should process a data transfer with the SPI
block when it is set up to be a slave. This process assumes that any prior data transfer
has already completed. It is required that the system clock driving the SPI logic be at least
8X faster than the SPI.
Note: A read or write of the SPI data register is required in order to clear the SPIF status
bit. Therefore, at least one of the optional reads or writes of the SPI data register must
take place, in order to clear the SPIF status bit.
Read Overrun
A read overrun occurs when the SPI block internal read buffer contains data that has not
been read by the processor, and a new transfer has completed. The read buffer
containing valid data is indicated by the SPIF bit in the status register being active. When
a transfer completes, the SPI block needs to move the received data to the read buffer. If
the SPIF bit is active (the read buffer is full), the new receive data will be lost, and the read
overrun (ROVR) bit in the status register will be activated.
Write Collision
As stated previously, there is no write buffer between the SPI block bus interface, and the
internal shift register. As a result, data must not be written to the SPI data register when a
SPI data transfer is currently in progress. The time frame where data cannot be written to
the SPI data register is from when the transfer starts, until after the status register has
been read when the SPIF status is active. If the SPI data register is written in this time
frame, the write data will be lost, and the write collision (WCOL) bit in the status register
will be activated.
Mode Fault
5. Read the SPI status register.
6. Read the received data from the SPI data register (optional).
7. Go to step 3 if more data is required to transmit.
1. Set the SPI control register to the desired settings.
2. Write the data to transmitted to the SPI data register (optional). Note that this can only
3. Wait for the SPIF bit in the SPI status register to be set to 1. The SPIF bit will be set
4. Read the SPI status register.
5. Read the received data from the SPI data register (optional).
6. Go to step 2 if more data is required to transmit.
be done when a slave SPI transfer is not in progress.
after the last sampling clock edge of the SPI data transfer.
Rev. 04 — 26 August 2009
Chapter 19: LPC24XX SPI
UM10237
© NXP B.V. 2009. All rights reserved.
529 of 792